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Q. No.Genes A, B, C, and D are linked. The distances between the genes are:
Relationship
Map Unit
D – A
11
D – B
7
D – C
22
B – C
15
A – B
4
What is the order of the genes on the chromosome?
1. D B A C
2. D B C A
2. D C B A
4. A B C D
Subtopic: Recombination Gene Mapping |
93%
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A woman whose father was colorblind marries a normal man. What are the chances that their son would have colorblindness?
1. 0%
2. 25%
3. 50%
4. 100%
1. 0%
2. 25%
3. 50%
4. 100%
Subtopic: Mendelian Disorders |
73%
From NCERT
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A change in chromosome number, where the changed number is not an exact multiple of the base number N, is called as:
| 1. | Polyteny | 2. | Aneuploidy |
| 3. | Polyploidy | 4. | Euploidy |
Subtopic: Non - Disjunction & Aneuploidy | Chromosomal Disorders |
82%
From NCERT
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Consider the given two statements.
1. Only Statement I is correct.
2. Only Statement II is correct.
3. Both Statement I and Statement II are correct.
4. Both Statement I and Statement II are incorrect.
| Statement I: | It is not necessary that the dominant allele will be the most common allele in a population. |
| Statement II: | Dominance is not an autonomous feature of an allele. |
2. Only Statement II is correct.
3. Both Statement I and Statement II are correct.
4. Both Statement I and Statement II are incorrect.
Subtopic: Monohybrid Cross: 1 |
80%
From NCERT
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Which of the following best explains a frequency of recombination of 50% in a dihybrid test cross?
| 1. | The two genes are likely to be located on different chromosomes. |
| 2. | All of the offspring have combinations of traits that match one of the two parents. |
| 3. | The genes are located on sex chromosomes. |
| 4. | Abnormal meiosis has occurred. |
Subtopic: Linkage | Recombination Gene Mapping | Recombination & Gene Mapping |
59%
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Which of the following statements correctly describes the difference between incomplete dominance and co-dominance?
| 1. | Incomplete dominance results in progeny not resembling either of the parents, whereas co-dominance results in progeny resembling both parents. |
| 2. | Incomplete dominance involves multiple alleles, while co-dominance does not. |
| 3. | Co-dominance occurs in phenotypes only, while incomplete dominance occurs in genotypes. |
| 4. | Incomplete dominance is a type of sex-linked inheritance, whereas co-dominance occurs in autosomes. |
Subtopic: Dominance Deviation from Mendel: 1 |
98%
From NCERT
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| Assertion (A): | Pure lines breed true. |
| Reason (R): | Pure lines are heterozygous for the trait. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True, (R) is False |
| 4. | (A) is False, (R) is False |
Subtopic: Introduction to Genetics: 1 |
88%
From NCERT
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Consider the given two statements:
| Assertion (A): | Scientifically, it is correct to say that the sex of the baby is determined by the father and not by the mother in humans. |
| Reason (R): | In humans, the males are homogametic but the females are heterogametic. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True (R) is False |
| 4. | (A) is False (R) is True |
Subtopic: Sex Determination |
93%
From NCERT
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Consider the given two statements:
| Statement I: | Bateson and Punnett gave the chromosomal theory of inheritance. |
| Statement II: | de Vries, Correns and Tschermak rediscovered Mendel’s laws. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is incorrect; Statement II is correct |
| 3. | Statement I is correct; Statement II is incorrect |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Chromosomal Basis of Inheritance: Introduction |
91%
From NCERT
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What is the probability of having a child with a medium skin color in humans if both parents are heterozygous (AaBbCc)?
| 1. | 1/64 | 2. | 6/64 |
| 3. | 15/64 | 4. | 20/64 |
Subtopic: Polygenic Inheritance & Pleiotropy |
From NCERT
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